diff --git a/Makefile b/Makefile
index 2d55d237..62f080fe 100644
--- a/Makefile
+++ b/Makefile
@@ -5,3 +5,5 @@ crypto: crypto.rc $(wildcard *.rs)
 
 clean:
 	rm -f crypto libcrypto-*.so
+	rm libcrypto-*.dylib
+	rm -rf *.dSYM
diff --git a/hash.rs b/hash.rs
index bd19f333..be8fb9a6 100644
--- a/hash.rs
+++ b/hash.rs
@@ -1,4 +1,5 @@
 use std::libc::c_uint;
+use std::{libc,vec,ptr};
 
 pub enum HashType {
     MD5,
@@ -108,6 +109,7 @@ mod tests {
     use super::*;
     use hex::FromHex;
     use hex::ToHex;
+    use std::vec;
 
     struct HashTest {
         input: ~[u8],
@@ -125,7 +127,7 @@ mod tests {
         let calced = calced_raw.to_hex();
 
         if calced != hashtest.expected_output {
-            io::println(fmt!("Test failed - %s != %s", calced, hashtest.expected_output));
+            println(fmt!("Test failed - %s != %s", calced, hashtest.expected_output));
         }
 
         assert!(calced == hashtest.expected_output);
diff --git a/hex.rs b/hex.rs
index 380369f4..e838080a 100644
--- a/hex.rs
+++ b/hex.rs
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-extern mod std;
+use std::{str,uint,vec};
 
 pub trait ToHex {
     fn to_hex(&self) -> ~str;
diff --git a/hmac.rs b/hmac.rs
index 1c9e145d..025c1dfe 100644
--- a/hmac.rs
+++ b/hmac.rs
@@ -15,6 +15,7 @@
  */
 
 use hash::*;
+use std::{libc,ptr,vec};
 
 #[allow(non_camel_case_types)]
 pub struct HMAC_CTX {
@@ -47,12 +48,12 @@ pub fn HMAC(ht: HashType, key: ~[u8]) -> HMAC {
         let (evp, mdlen) = evpmd(ht);
 
         let mut ctx : HMAC_CTX = HMAC_CTX {
-            mut md: ptr::null(),
-            mut md_ctx: ptr::null(),
-            mut i_ctx: ptr::null(),
-            mut o_ctx: ptr::null(),
-            mut key_length: 0,
-            mut key: [0u8, .. 128]
+            md: ptr::null(),
+            md_ctx: ptr::null(),
+            i_ctx: ptr::null(),
+            o_ctx: ptr::null(),
+            key_length: 0,
+            key: [0u8, .. 128]
         };
 
         HMAC_CTX_init(&mut ctx,
@@ -91,5 +92,5 @@ fn main() {
 
     h.update([00u8]);
 
-    io::println(fmt!("%?", h.final()))
+    println(fmt!("%?", h.final()))
 }
diff --git a/pkcs5.rs b/pkcs5.rs
index c43999ee..bd122c43 100644
--- a/pkcs5.rs
+++ b/pkcs5.rs
@@ -1,4 +1,5 @@
 use std::libc::c_int;
+use std::{vec,str};
 
 #[link_args = "-lcrypto"]
 #[abi = "cdecl"]
@@ -43,6 +44,7 @@ pub fn pbkdf2_hmac_sha1(pass: &str, salt: &[u8], iter: uint,
 #[cfg(test)]
 mod tests {
     use super::*;
+    use std::str;
 
     // Test vectors from
     // http://tools.ietf.org/html/draft-josefsson-pbkdf2-test-vectors-06
diff --git a/pkey.rs b/pkey.rs
index 3d8ba5f9..30f48938 100644
--- a/pkey.rs
+++ b/pkey.rs
@@ -1,4 +1,5 @@
 use std::libc::{c_int, c_uint};
+use std::{libc,cast,ptr,vec};
 use hash::{HashType, MD5, SHA1, SHA224, SHA256, SHA384, SHA512};
 
 #[allow(non_camel_case_types)]
@@ -99,7 +100,7 @@ pub fn PKey() -> PKey {
 
 ///Represents a public key, optionally with a private key attached.
 priv impl PKey {
-    priv fn _tostr(&self, f: extern "C" unsafe fn(*EVP_PKEY, &*mut u8) -> c_int) -> ~[u8] {
+    priv unsafe fn _tostr(&self, f: extern "C" unsafe fn(*EVP_PKEY, &*mut u8) -> c_int) -> ~[u8] {
         let buf = ptr::mut_null();
         let len = f(self.evp, &buf);
         if len < 0 as c_int { return ~[]; }
@@ -112,7 +113,7 @@ priv impl PKey {
         vec::slice(s, 0u, r as uint).to_owned()
     }
 
-    priv fn _fromstr(
+    priv unsafe fn _fromstr(
         &mut self,
         s: &[u8],
         f: extern "C" unsafe fn(c_int, &*EVP_PKEY, &*u8, c_uint) -> *EVP_PKEY
diff --git a/rand.rs b/rand.rs
index e4cf2d1a..74d88952 100644
--- a/rand.rs
+++ b/rand.rs
@@ -1,4 +1,5 @@
 use std::libc::c_int;
+use std::vec;
 
 #[link_args = "-lcrypto"]
 #[abi = "cdecl"]
@@ -28,6 +29,6 @@ mod tests {
     #[test]
     fn test_rand_bytes() {
         let bytes = rand_bytes(32u);
-        io::println(fmt!("%?", bytes));
+        println(fmt!("%?", bytes));
     }
 }
diff --git a/symm.rs b/symm.rs
index 1cb8ed44..e483a079 100644
--- a/symm.rs
+++ b/symm.rs
@@ -1,4 +1,5 @@
 use std::libc::{c_int, c_uint};
+use std::{libc,vec};
 
 #[allow(non_camel_case_types)]
 type EVP_CIPHER_CTX = *libc::c_void;
@@ -236,11 +237,11 @@ mod tests {
         let computed = cipher.update(pt.from_hex()) + cipher.final();
 
         if computed != expected {
-            io::println(fmt!("Computed: %s", computed.to_hex()));
-            io::println(fmt!("Expected: %s", expected.to_hex()));
+            println(fmt!("Computed: %s", computed.to_hex()));
+            println(fmt!("Expected: %s", expected.to_hex()));
             if computed.len() != expected.len() {
-                io::println(fmt!("Lengths differ: %u in computed vs %u expected",
-                                 computed.len(), expected.len()));
+                println(fmt!("Lengths differ: %u in computed vs %u expected",
+                             computed.len(), expected.len()));
             }
             fail!(~"test failure");
         }